能源研究与管理2025，Vol.17Issue(4)：9-17,9.DOI:10.16056/j.2096-7705.2025.04.002
中低温槽式光热发电系统中换热器窄点位置分析
Pinch Point Location Analysis of Heat Exchangers in the Medium and Low Temperature Parabolic-trough Photo-thermal Power Generation System
摘要
Abstract
There is a lack of research on the pinch point location of heat exchangers in organic Rankine cycle systems,therefore this paper proposes a criterion for determining the pinch point locations of evaporators and condensers in the medi-um and low temperature parabolic trough photo-thermal power utilization system.The variation pattern of the pinch point locations in the evaporators and condensers is discussed when heat sources are quaternary nitrate salt and thermal oil,and cold sources are water and compressed air.Research results indicate that,the influence of the inlet temperature and pressure of working fluid on the pinch point locatione is relatively smaller than the influence of mass flow rate of heat sources.Moreover,when thermal oil is selected as heat sources,the pinch point is more likely to appear at the location when phase transition of R123 begins.When the cold source is water,the pinch point always occurs at the position where the working fluid begins to condense.When the cold source is compressed air,the possibility that the pinch point occurs at the position of the entrance in the condensers is reduced with the pressure increase and temperature decrease of working fluid.This study has certain guiding significance for the thermal design and operation control of heat exchangers in medium and low temperature parabolic trough solar thermal power generation systems.关键词
窄点位置/蒸发器/冷凝器/冷热源/工质Key words
pinch point location/evaporator/condenser/heat and cold sources/working fluid分类
能源科技引用本文复制引用
LI Junfen,WU Yuhang,GENG Zhi,LI Renfeng..中低温槽式光热发电系统中换热器窄点位置分析[J].能源研究与管理,2025,17(4):9-17,9.基金项目
河南省科技攻关项目(242102240049) （242102240049）
河南省自然科学基金青年基金(252300420501) （252300420501）
2025年度郑州航院青年科研专项(25ZHQN01018) （25ZHQN01018）
2025年郑州航院研究生教育改革与发展研究项目(2025YJSJG54) （2025YJSJG54）
河南省研究生教育改革与质量提升工程项目(YJS2024JD47) （YJS2024JD47）
河南省高等学校重点科研项目计划(25A480002) （25A480002）
郑州航院研究生质量提升工程项目(2025YJSLH02) （2025YJSLH02）
